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Jena (Apache)

Jena (Apache). olivier.corby@inria.fr. Jena. HP, Apache http://jena.apache.org/ RDF Triple Store In memory or in database Fuseki SPARQL endpoint. Load. Model model = ModelFactory.createDefaultModel (); InputStream in = FileManager.get (). open(" data.ttl ");

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Jena (Apache)

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  1. Jena (Apache) olivier.corby@inria.fr

  2. Jena • HP, Apache • http://jena.apache.org/ • RDF Triple Store • In memory or in database • Fuseki SPARQL endpoint

  3. Load Model model = ModelFactory.createDefaultModel(); InputStreamin = FileManager.get().open("data.ttl"); model.read(in, null, "TTL");

  4. Query String queryString = "select * where { ?x ?p ?y }"; Queryquery = QueryFactory.create(queryString); QueryExecutionqe = QueryExecutionFactory.create(query, model); ResultSetresults = qe.execSelect(); ResultSetFormatter.output(results, ResultsFormat.FMT_RS_XML);

  5. Result for (; results.hasNext();) { QuerySolutionsol = results.next(); Literallit = sol.getLiteral("y"); System.out.println("y: " + lit.getString()); }

  6. Update String q = "prefixfoaf: <http://foaf.org/> " + "create graph foaf:g1 ;" + "insert data {graph foaf:g1 {" + <John> foaf:knows <Jim>, <James>}}"; Model model = ModelFactory.createDefaultModel(); Datasetds = DatasetFactory.create(model); UpdateAction.parseExecute(q, ds) ;

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